%!TeX program = xelatex
\documentclass[t]{beamer}
\usepackage{textpos}
\usepackage{ctex}
\usefonttheme{structureitalicserif}
%\setlength{\parindent}{2em}
\title{报告名称}
\subtitle{报告子标题}
\institute{陕西师范大学\ 计算机科学学院 }
\author{作者}
\usetheme{Berkeley}
\usecolortheme{whale}
\usefonttheme{structureitalicserif}
 \usepackage{tikz}
\addtobeamertemplate{frametitle}{}{
	\begin{tikzpicture}[remember picture,overlay]
	\node[anchor=north west,yshift=4pt,xshift=-4pt] at (current page.north west) {\includegraphics[height=1.5cm]{snnu-white}};
	\end{tikzpicture}}

\addtobeamertemplate{title page}{}{
	\begin{tikzpicture}[remember picture,overlay]
	\node[yshift=75pt,xshift=45pt]{\includegraphics[height=2.5cm]{snnu-gray}};
	\end{tikzpicture}
}
 
\begin{document}
	\maketitle
	\begin{frame}{报告的第一页标题}{第一页的子标题}
				% \vspace{-10pt}%deal with the large space between frame title and content block
		相关的内容
	\end{frame}
\begin{frame}[c]{结束}
			% \vspace{-10pt}%deal with the large space between frame title and content block
	\centering{\textbf{结\ 束\\ 谢\ 谢}}
\end{frame}
\end{document}